Generator-valve for gasolene-engines.



F. L. SWANBBRG.

GENERATOR VALVE FOR GASOLENE ENGINES.

APPLICATION FILED DEO. 27, 1907.

` Patented June 13, 1911.

srATEs ATENT OFFICE.

FLOYD L. SWANBERG, OF CINCINNATI, OHIO, ASSIGNOR TO THE D. T. WILLIAMSVALVE COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

GENERATOR-VALVE FOR GASOLENE-ENGINES.

Specification of Letters Patent. Patented June 13, 1911.

Application led December 27, 19C?. Serial No. 408,236.

To all whom it may concern:

Be it known that LFLOYD L. SWANBERG, a citizen of the United States,residing in Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Generator- Valvesfor Gasolene-Engines, of which Athe following is a full, clear, andexact description, reference being' had to the accompanying drawings,forming part of this speciication.

My invention relates to generator or mixing valves for gasolene englnesmore particularly adapted for use with marine gas engines of the twocycle type, although, of course, so far as the improvements are adaptedfor supplying the proper mixture of gas and air to any type of engine,my invention is not to be understood as limited to marine engineswhether of one type or another.

My improvements consist of the novel construction and arrangement ofparts which will be hereinafter particularly pointed out and claimedwhich embody features of construction whereby the proper mixture of gasapd air may be furnished for either high or ow speeds and in which theliability of leakage of the gasolene when the engine is at rest isovercome.

In the drawings Figure 1 is a central 'vertical section of my improvedgenerator taken at right angles to the-gasolene valve. Fig. 2 is asimilar horizontal section of same. Fig. 3 is a central vertical sectiontaken at right angles to the section shown in Fig. 1 'and Fig. l is avertical section taken through the throttle valve. Fig. 5 is ahorizontal section taken on lines 5--5 of Fig. 3.

1 is a cylindrical metal casing forming the mixing chamber 2, andprovided with an inlet pipe`3, secured in the base, gasolene inlet pipe4, secured at one side, and the eduction port 5, for the mixture fromthe mixing chamber 2, tothe engine cylinder.

6 is the air inlet valve comprisin a disk 7, having its seat in the base8, of t e mixing chamber, and provided with a hollow stem 9, which isided in the socket 10 of the'bushing 11, epending from the screwthreaded cap 12, which closes the upper end of the mixing chamber.

The gasolene is supplied through ipe 4, through the inlet port 13, whichis ormed in' a tubular casing 15, which vextends across the air'inletport below the seat of the `air lnlet valve, and the supply of gasoleneis controlled by the needle valve 14, provided with screwthreaded stem16, and knurled head 17, the valve being held in set position by thespring plate 18, secured by a nut 19, while20 is the packing withstuffing box cap 21, for the valve stem. A passage 22, for the gasoleneis drilled into the needle valve openlng and leads vertically upwardunder the air inlet valve 6. This passage is closed by "the needle'check valve 23, which is provided with a stem 24, which is looselyguided in the hollow socket of the Valve stem 9, of the air valve. Thisneedle. valve stem 24, is provided with a head 25, which slides looselyin the socket 10, of the bushing 11, and the valve is kept on its seatby the lightcoiled spring 26, interposed between the head 25, and thebase of the socket.

' 27 is a screw threaded adjusting rod, with milled head 28, which rodextends down in to the socket 10 around the coiled spring 26, and byadvancin or retracting this rod the lift of the chec valves is adjustedas desired. 35 is the packing and 36 the gland forming a stuffing boxfor this adjusting rod. The length of the needle valve 23, with its stemis such that when the air valve 6 and needle valve 23, are both seated,a space 29 is left between the head 25, and the upper end of the stem 9,so that as the air valve is opened by the engine suction the gasolenecheck valve will retain its seat momentarily unt-il the head 25, islifted by the air valve stem.

I find that this construction enables me to furnish a much more perfectmixture of air and gasolene than is possible with the ordinary generatorvalve constructions in which the gasolene-inlet is usually drilled intothe air valve seat. In the older constructions the air valve also formsthe gasolene valve and the gasolene enters with the air. Better resultsare obtained I havev discovered when' 'the air valve opens momentarilyahead of the gasolene port. ln addition tothis `in such constructionsthe gasolenel enters at the side of the air inlet, so that there is`much less suction on the gasolene than there is in my construction inwhich. the gasolene is delivered centrally of the air inlet. By theintroduction of the gasolene into the center -of the current ofinrushing air a more perfeet mixture of the two gases is obtained.Moreover with my construction there is no liability of leakage ofgasolene when the engine is at rest. Heretofore any failure of the airvalve to seat itself tightly, either from wear of the valve or dirt onthe seat, or from any other cause, has resulted in a leakage ofgasolene, and the gasolene supply has had to be cutoff to insure againstleakage. This shutting off of the gasolene supply is verydisadvantageous, for when the gasolene needle valve has been adjusted byexperiment to furnish the proper amount of gasolene required for aperfect mixture under any existing conditions of atmosphere ortemperature, any further manipulation of the gasolene valve destroys atonce the proper adjustment, which can only be again determined byfurther experiment.

The supply of the perfect mixture from the mixing chamber 2, to theengine cylinder is fully controlled by the butterfly throttle valve 30,mounted on the stem 3l, with operating handle 32. Mounted on the stem3l, is the packing 33, with stufiing box cap 34. The stem 27 is alsoprovided with packing 35, held in place by the gland 36. When the propermixture has been determined by setting the gasolene supply valve, forvarying speeds the supply is fully controlled by this throttle valve. Inorder to hold the stem of this valve in fixed position, and to preventthe jarring of the engine from disturbing its position, I provide a setscrew 37, which takes through an elongated boss 38 in the casing, andbears upon a coiled spring 39, interposed between the set screw and theplunger 40.V The plunger is thus held under spring pressure against thestem 31, of the throttle valve, which holds the valve in any position itmay be set.

In order to prevent dirt or sediment in the gasolene from passing .intothe mixing valve, and to assist in the condensation of i vancing and anywater in the gasolene, I provide a gauze screen 4l for the gasolenepipe. This screen is set in a socket in the outer end of the extensionof the casing through which the gasolene is introduced and held in placeby a suitable washer while 42 is the coupling sleeve screw threaded inthe'end of the pipe 4, and 43 the coupling nut, the seat ends of thecoupling sleeve and casing being formed with concave and convex surfacesto form a tight joint. In passing through the wire screen 41, anymoisture inthe gasolene is condensed `and collects in the chamber 44,whence it runs down intoA the receptacle 45, formed in an enlargementvon the casing below the gasolene inlet, and as the water accumulates itis discharged through the port 46, normally closed by the valve 47.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is:

Ina device of the character specified, a carbureting chamber, a valvefor controlling the supply of gasolene thereto, a check valve for theair and a check valve for the gasolene, the air valve provided with ahollow stem to receive and guide the stem of the gasolene check valve,with the inlet for the gasolene centrally of and immediately below theair check valve, the gasolene check valve stem extending beyond thehollow stem of the air valve and having a head in the pathway thereofbut normally out of contact therewith whereby the two check valves willbe opened in succession, and a coiled spring bearing between the casingand the head of the gasolene valve to hold the same to its seat, with arod for controlling the lift of the check valves and external means foradretracting said rod.

FLOYD L. SWANBERG. Witnesses:

` FRANK H. KUNKEL,

BEssm A. BEALL.

